diff --git a/cheroot/ssl/pyopenssl.py b/cheroot/ssl/pyopenssl.py
index ea4da5359d..8b01b348de 100644
--- a/cheroot/ssl/pyopenssl.py
+++ b/cheroot/ssl/pyopenssl.py
@@ -150,7 +150,7 @@ def sendall(self, *args, **kwargs):
         return self._safe_call(
             False,
             super(SSLFileobjectMixin, self).sendall,
-            *args, **kwargs
+            *args, **kwargs,
         )
 
     def send(self, *args, **kwargs):
@@ -158,7 +158,7 @@ def send(self, *args, **kwargs):
         return self._safe_call(
             False,
             super(SSLFileobjectMixin, self).send,
-            *args, **kwargs
+            *args, **kwargs,
         )
 
 
diff --git a/cheroot/test/test_core.py b/cheroot/test/test_core.py
index 7732b6f7a8..d33647888e 100644
--- a/cheroot/test/test_core.py
+++ b/cheroot/test/test_core.py
@@ -134,7 +134,7 @@ def test_query_string_request(test_client):
         '/hello',  # plain
         '/query_string?test=True',  # query
         '/{0}?{1}={2}'.format(  # quoted unicode
-            *map(urllib.parse.quote, ('Юххууу', 'ї', 'йо'))
+            *map(urllib.parse.quote, ('Юххууу', 'ї', 'йо')),
         ),
     ),
 )
diff --git a/cheroot/testing.py b/cheroot/testing.py
index 3e404e59ea..adf157ee79 100644
--- a/cheroot/testing.py
+++ b/cheroot/testing.py
@@ -41,7 +41,7 @@ def cheroot_server(server_factory):
             actual_bind_addr = (interface, bind_port)
             httpserver = server_factory(  # create it
                 bind_addr=actual_bind_addr,
-                **conf
+                **conf,
             )
         except OSError:
             pass